package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void insert(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);
        if (shoppingCarts != null && shoppingCarts.size()>0){
            shoppingCart = shoppingCarts.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()+1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }else{
            Long dishId = shoppingCart.getDishId();
            if (dishId != null){
                Dish dish = dishMapper.getById(shoppingCart.getDishId());
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else {
                Setmeal setmeal = setmealMapper.getSetmealById(shoppingCart.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> getShoppingCartsByUserId(Long userId) {
        return shoppingCartMapper.getShoppingCartsByUserId(userId);
    }

    @Override
    public void deleteAllShoppingCartByUserId(Long userId) {
        shoppingCartMapper.deleteAllByUserId(userId);
    }

    @Override
    public void shoppingCartSub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);
        if (shoppingCarts != null && shoppingCarts.size()>0){
            shoppingCart = shoppingCarts.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()-1);
            Integer number = shoppingCart.getNumber();
            if (number <= 0) {
                shoppingCartMapper.deleteById(shoppingCart.getId());

            }else {
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }
    }
}
